redline 15w50 ?

[pbonsalb]

From the blog:
CONCLUSION
Short of rebuilding those engines correctly with proper clearances, which is what is actually needed, the one thing owners can easily do to significantly help with this rod bearing problem, is to run a much thinner oil than the insanely thick 10W60 that BMW had specified for years. I recommend selecting a highly ranked 5W30 API SN oil from my Wear Protection Ranking List, which will make a HUGE improvement in rod bearing oil flow/lubrication/cooling, compared to the more commonly used super thick 10W60. This one significant change may well prevent having to rebuild those engines, and would go a long way toward eliminating rod bearing failures in many M3/M5’s.

[New2Roundel]

Originally Posted by RomanK

https://540ratblog.wordpress.com/
Nice blog for reading and choosing the oil viscosity. Search there keyword "s65"...

Not really that enlightening. With regard to our engines, he's not adding anything new and nothing empirical to the discussion. His proof of concept that what he's pushing is correct for the S65 is some random email from a guy with a different M engine? Sorry, but his section is not remotely convincing.

You know, the one thing I really liked when I got my Jeep SRT is that one of the forums was able to record an online chat with a couple of the actual engineers who designed the engine (which is shared across platforms). One of the forum members asked about why the 6.4L engine requires Penzoil Ultra Platinum instead of a more standard options (I have yet to find UP in stores around me). I don't recall the exact answer right now, but they mentioned that there was a specific level of additives in UP that lead to the use of that specific type of oil. Asked and answered.

Frankly, until this level of access is given to BMW owners, everything else is simply speculation and theory. You want to run lighter oils, go for it. There's no empirical data as to how good or bad such a move is---or how thin you should go. I prefer to keep things as recommended because I've seen no data to convince me otherwise. Personally, if there was a 0w or 5w version of the 60 series oil, that's what I'd opt for. Makes sense to me, but not something I could definitively say would help either.

[pbonsalb]

I’d defer to the oil expert rather than BMW’s one size fits all uses oil recommendation for an engine that by most accounts has some design flaws. Certainly the blogger’s information is controversial in that it runs counter to the specifications for many cars. Those who do not believe what the blogger writes and instead believe that they must use whatever the car manufacturer specified will remain unpersuaded.

[dparm]

Originally Posted by Headhunter.M3

I saw this ad on bimmerworld.com, they sell products exclusively for bmws and have an oil change kit for 15w50, they also explain why they would use this over 10w60. I was intriqued and wonder if anyone else on this forum has ran this redline oil? - https://www.bimmerworld.com/Oil-Chan...ilter-Kit.html

Again, what objective data do you have to show the 10w60 is inadequate? You are reading something written mostly by a marketing person in that link.

I'm not 100% behind what BW is claiming. Pour point is a worthless metric, and higher ZDDP content doesn't necessarily make it any better. There are more modern anti-wear additives that accomplish the same thing. Castrol uses titanium, for example.

It seems like you've made up your mind. Use the 15w50 and show us some data over a few oil change intervals so we know how it went.

[RomanK]

I already 60k on 0-40. My friend already 100k on 0-40... Both with BE and ARP...

[New2Roundel]

Originally Posted by pbonsalb

Those who do not believe what the blogger writes and instead believe that they must use whatever the car manufacturer specified will remain unpersuaded.

I don't know about you, but I don't believe things just because someone tells me something's true. I understand some of the logical arguments that get made, but I'm also not convinced that the so-called "oil experts" are considering all of the factors. Show me some evidence in functioning cars. Not some testing done on a bench. I'm more than open to change my ways if convincing data can be provided. At this point in time, I've seen no data that says my engine is better off with a different (thinner) grade of oil. I read a ton of opinions and anecdotes. That data however, will never be provided---either from the know-it-all experts or from the OEMs. So it's basically essentially a faith-based decision at the end of the day.

[pbonsalb]

You would have to spend some time on bob is the oil guy and read the 540 blog to learn more. One of the guys on bob is the oil guy was involved in the creation of Castrol 10W60. No one is trying to convince you. You can put molasses in your motor for all I care. It’s more that by learning, you might expand your knowledge a bit and perhaps convince yourself. Most people don’t want to go through that trouble. They just do what BMW says. BMW says your transmission fluid is lifetime, by the way, so don’t ever change it.

[Headhunter.M3]

I feel you. I wondered that same thing about marketing with them. Seems like they only carry Redline, they may have a contract with them or very well may just trust their products.

I am due for a change in about 500 miles. What are you running? I have always used 10w60 Motul in my past m3s with no issues and always seemed to run very smoothly, this m3 is new to me, has 25k miles and has BMW 10w60 now with the ceratec i added. I want to pick an oil and stick with it long term. I probably won't ever drive this in freezing temps but sometimes in 40 degree weather at the coldest.

10w60 motul or 15w50 redline are my two i am trying to decide between. I am not 100% behind what BW is claiming either. I like to go by what OEM recommends but the redline 15w50 oil specs look very good.

[ZHUK]

I use Redline 10w60 due to hot weathers in summer, engine feels ok and rod bearings haven't been changed since i purchased a car. Current millage is 80k km. However i will change them as soon vac motorsport will be able to sent them overseas.

[dparm]

Why did you double-post this?

[dparm]

I used M1 0W40, Castrol 10w60, an the BMW (Shell) 10w60. There was no functional difference between any of them, and all of the reports came back virtually the same.

I would tell you to run whichever 10w60 is cheapest, there's very little difference between them.

[Headhunter.M3]

How does the grand sport compare to the m3? Do you like it better? I have thought about getting one too. Love the grand sport

[Headhunter.M3]

Originally Posted by dparm

Why did you double-post this?

I wasnt sure which thread to put it in. Was lookin for a quick answer

[Headhunter.M3]

btw my m3 beat my friends m4 CS the other day from 100-160. Only thing i could think was heat soak with his maybe? It was pretty sweet thoug

[pbonsalb]

Those long pulls can raise the IAT on a turbo car resulting in decreased timing and boost. You can fix that with water/meth, bigger intercooler, E85, bigger turbo, etc.

[CarPoor]

I can’t speak for Redline but my local M3 mechanic runs Mobil 1 15w50 in his E92 M3 race car and has for years.

[dparm]

Originally Posted by Headhunter.M3

How does the grand sport compare to the m3? Do you like it better? I have thought about getting one too. Love the grand sport

Very different car, despite also being NA V8 RWD. It's obviously very fast and capable, embarrasses a lot of other things on the track.


Here's my old thread when I got it:
https://www.m3post.com/forums/showthread.php?t=1373088

[Headhunter.M3]

That is awesome. I may have to go test drive one when all this clears up. Love the colors of yours too.

[Headhunter.M3]

Originally Posted by CarPoor

I can’t speak for Redline but my local M3 mechanic runs Mobil 1 15w50 in his E92 M3 race car and has for years.

thats very intereating. I wonder if he has ever changed the rod bearings or had any issues? Sounds like a cool guy. Gotta love mobil 1

[CarPoor]

Originally Posted by Headhunter.M3

thats very intereating. I wonder if he has ever changed the rod bearings or had any issues? Sounds like a cool guy. Gotta love mobil 1

He is on the original rod bearings and says UOAs come back fine.

[dparm]

M1 15w50 is a decent oil for track use. Chevy recommends it for track usage on all of the Camaros and Corvettes...but they recommend removing it after you're done at the track (probably due to startup wear and lack of protection against LSPI). It's an old-school formula.

I've seen other Chevy guys run the M1 0w40 and add a quart of M1 0w50 Racing oil to thicken it slightly and boost the anti-wear pack.

[Headhunter.M3]

I ended up using motul 10w60. Its good oil.